code: def unset_base_path() -> None:
      global _current_base_path
      _current_base_path = None
  
imports: from __future__ import annotations
  import copy
  import dataclasses
  import importlib
  import json
  import os.path
  from pathlib import Path
  import socket
  from typing import TYPE_CHECKING, get_type_hints
  import typeguard
  import nni.runtime.config
  from .public import is_missing
label_desc: Use image node_id 3 for calling a global function with example usage: unset_base_path() without return types